400 meter U20 Women - Heats, Heat:1 of 3 ; Official result since 11:51
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 2 | 1719 | GEORHIANA SESAY | SLE | U20 | 54.40 | Q | ||
| 2 | 6 | 1441 | KAPUNJILA EMELDA | ZAM | U20 | 55.50 | Q | ||
| 3 | 7 | 1262 | MJINJIWA THELMA | ZIM | U20 | 57.40 | q | ||
| 4 | 4 | 1149 | TEEDZANI THATO | BOT | U20 | 60.00 | |||
| 5 | 1328 | AKONYI NGONGO PLAME | COD | U20 | DNS |